Gravitational Force refers to a natural phenomenon by which all physical bodies with mass are brought towards one another, and is described by Sir Isaac Newton's law of universal gravitation. It states that every point mass attracts every other point mass in the universe through a force that is directly proportional to the product of their masses and inversely proportional to the square of distance between them. In simpler terms, it means that heavier objects are pulled towards each other more than lighter ones, and this force decreases as the distance between two objects increases. This force plays an important role in keeping planets in orbit around stars, and is responsible for many natural phenomena such as tides, earthquakes, and even the formation of galaxies.